Combination gas and coal grate.



M. L. COMBINATION GAS Am) 'OOAL'GRATB. APPLICATION FILED JULY'IE, 1912.

Patented Mil 2 19.12.

Attorneys MIonAEL L. SCANLON, or CLEVELAND, OHIO.

COMBINA'fJEON GAS AND COAL GRATE.

To. all whom it concern: B ei-itkn'own that I, MICHAEL L. Sownox', a citlz'en of the United States, residing at Cleveland,in*the county of Cuyahoga and State of Ohio,'have invented a new and use- Qonibination Gas and Coal Grate, of '1 which; the following is a specification.

' I This invention relates to grates for ranges, stoves, furnaces,.boilers and the like,

and-has for its primary object to provide a grate [adapted to be employed for burning gas or for the usual function, in forming the -bottom ofthe fire box when coal, coke or' other materialis used.

The present invention contemplates the provision of a grate embodying a pair of ollow grate bars, pivoted in a frame andwhioh are so constructed that they may be reversed for use with gas or coal.

ventio'n to provide a grate of the character It is a further object-of the present inindioated whichshall be simple, substantlah durable and inexpensive in constructionjas well as convenient and efficient in :The tpresent invention also aims to provide other advantages and to generally improve grates of this character, as will hereinafter more fully appear.

With theforegoing and other objects in View which .Will appear as the description proceeds, ;the invention resides 1n the combination and arrangement of parts and in the details'of construction hereinafter described andclai ned, it being understood that changes I in the precise embodiment of the invention herein disclosed, can .be made within the scope of what is claimed, without departing from the spirit of the invention: 40

The invention has been illustrated I preferred embodiment in the accompanying drawings, wherein. like reference characters have been employed to denote correspondling parts, and wherein Figure 1 Isna planview-ofthe grate when employed in connection with c oal, coke orthgrfik ,1 Fig"; *2 i sinnlarxrview showing the" grate when employed for burning gas.

'--'Fig.* *-3 is transverse section of the grate when enqplpyed for burning gas.

Referring specifically to the drawings," the frame" of tlie' gr teh'as'ibeen designated I aamrar-r, "the same being of any t Specification of Letters Patent Application filed July 15, 1912. Serial No. 709,549.

in its- Patented Nbv.12,1e12.-

preferable construction, contour and size, to accommod'atc the range, stove, furnace, holler or the like to which it is applied, the frame as illustrated being rectangular" Incarrying out the present invention, the.

sides of the frame are provided with inner lugs 5 and 'each end is provided with a pair of seats 6. The grate bars, which have been designated by the numeral 7, are arranged longitudinally within the frame .4 and are provided at their ends with the re spective trunnions 8 and 8 engaging in the seats 6. The grate bars are thus mounted pivotally between the ends ofthe frame 4. v

and are made to rotate simultaneously in opposite directions by gears 9 carried by the pair of trunnions 8 exterior of the frame, which gears intermesh with each other. One ofthe trunnions 8 is preferably extended intoa non-circular portionlO forthe engagement of a crank (m -other suitable implement for conveniently shaking or rotating the grate bars.

Each grate bar 7 islet,semi-circular cross section and is provided with a l ongitudinall. bore or passage 11 which opens through the trunnion 8, the said bore tapering. forwardly ordecreasing in cross sectional area from the rear end to the frontend, the trunnions 8 being arranged at the rear [end and ,the trunnions 8' being arranged at the front end.

Gas may be supplied tothe grate bars by means of a pair of-branch pipeslQ connected to the ends of the t trunnions 8 by means of swivel connections or.unions;13.

The particular construction of the unions 13 is not essential and may be any de-v sired type, the same 1 therefore not. being illustrated or described in'detail.

Each of the grate bars' 7 are provided with the short and long lugs .14: and 15. respectively, along its sides or edges, which lugs are flush with the flat 'faces ofthe grate bars. The longlugs 15 are designed to pass between the lugs 5 ofthe-frame when the flatfa'cesof the grate bars-are downg and. their free endsare designed to cornea-close together-when theZfl-at faces: o-fithe grate bars are up'.

from the convex face" of each Projecting.

of the grate bars is provided a row of'ortlet nozzleslfi'ivhich are of considerablelength,

and which have :their; ducts l7v communi- I ed, so that when the grate bars are in one position, the flat and convex faces being up and down respectively, the free ends of the lugs 15 are arranged in close relation and the free ends of the lugs 14: are arranged between and in close relation with the free ends of the lu s 5. When the grate bars are in this position, the grate may be employed in its usual capacity for supporting coal, coke, or the like for consumption, the grate being provided with suitable openings for the passage of ashes. By engaging a crank or other suitable implement to the extension 10 of one of the trunnions 8,

the grate bars may be simultaneously rocked or agitated, thus facilitating 'the passage of ashes downwardly into the ash .pit below the grate. Then when the grate is to be converted into a gas burner, the extension 10 maybe rotated or swung so as to reverse the grate bars and to thus position the nozzles '16 in an upwardly projecting manner. When the grate bars have thus been reversed, the convex and flat faces are arranged up and down, respectively, and the free ends of the lugs 1e are spaced apart so as to provide a large central opening through which clinkers and the like may "drop, the free ends of the lugs 15 passing between the respective lugs 5. Gas may then be admitted into the hollow grate bars through the branch pipes 12, the gas being controlled by means of a suitable valve (not shown), and the gas passing into the grate barsis discharged through the tips of the nozzles 16, to provide'a series of flames. It will be observed that the nozzles in being of considerable length elevate the flames to such a position that they will effectively heat the object or body to be heated. This is of advantage for the reason that when coal, coke, or the like is burned, theflain es are arranged above same and are in close relation with the body or object to be heated, and should the gas flames be close to the grate, the flames would be spaced farther from the body or object to be heated so as to decrease theheating eiiiciency. In order that the nozzles may be of sutlicient length and that the grate bars may be assembled sufl'iciently close together, the nozzles must be in staggered relation and mustbe arranged to pass between each other as the grate bars are reversed, as above described.

The objects aimed at are thus attained in a satisfactory manner and it will be apparent that the present device provides a between each other when the mediate the lugs designed to pass between each other when the grate bars are reversed. 2. A combination gas and coal or coke grate comprising an open frame havmg inner lugs along its sides,'rig ht and left hand hollow gratebars having their ends pivoted to the ends-of the frame, each grate bar having short, and long lu s along its opposite sides, the long lugs eing designed .to pass between the lugs of the frame when the grate bars are in one position and their free ends being designed to come close to-- gether when the grate bars are in reversed position, the grate bars being provided with rows of staggered outlet nozzles intermediate the lugs designed to pass between each other when the bars are reversed and to project upwardly when'the said long lugs are between. the lugs on the frame, and an operative connection between the grate bars whereby they rotate simultaneously in vopposite directions.-

3. A combination gas and coal or coke grate embodying an .open frame havi' 1g seats in its ends, a pair of reversible grate bars arranged in the 'frame and having trunnions at the ends thereof engaging the said seats, the grate bars havinglugs along their sides and rows of staggered outlet nozzles intermediate the lugs, and the grate bars" also being provided with longitudinal passages communicating with the nozzles and opening through one pair of trunnions, and intermeshing gears carried by one pair of trunnions so that the, grate bars are simultaneously reversible in opposite directions, the nozzles being designed to pass grate bars are reversed, v p 7 4. -A combination gas and coal or coke grate embodying an open rectangular frame having inner lugs along its sides, and seats in its ends, a pair of grate bars of semi circular cross section having trunnions at their ends engaging the said seats, the grate bars having longitudinal passages therein opening through one pair of trunnions, each grate'bar having short and long lugs along its sides flush with the fiatface of the grate bar, the long lugs being designed to pass between the lugs on the frame when the with rows of staggered outletnozzles proas my own I have hereto afiijxed my signajectmg from their convex faces and deture 1n the presence of twewltnesses. slgned to pass between each other when the. MICHAEL L. S-GANLON grate bars are reversed, and mtermeshmg gears carried by the other pair of trunnions Witnesses:

exterior of the frame.

JOHN CAUeHlELL, In testimony that I claim the foregoing STEVA GAUGH'ELL. 

